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Revealed: The world's 20 most expensive buildings

17. Wembley Stadium, London

Total cost of construction: $1.5 billion

Formerly known as Empire Stadium, the historic venue was first opened to the public by King George V in 1923 and has hosted a series of music and sporting events. While the original stadium was demolished, its replacement, designed by Norman Foster, was built over it in 2007, and features a retractable roof. It is topped by a 133-metre arch, seats 90,000 and spanning twice the area of the original building, making it the largest covered arena in the world.